package com.taylor.community.entity;

import javax.management.remote.rmi._RMIConnection_Stub;

/**
 * 封装分页相关信息
 */
public class Page {
    // 当前的页码
    private int current = 1;
    // 显示多少条数据
    private int limit = 10;
    // 数据总数(用于计算总页数)
    private int rows;
    //查询路径(用于传递每页的路径)
    private String path;

    public int getCurrent() {
        return current;
    }

    public void setCurrent(int current) {
        if(current >= 1){
            this.current = current;
        }
       //避免用于传入不符合要求是数
    }

    public int getLimit() {
        return limit;
    }

    public void setLimit(int limit) {
        if(limit >= 1 && limit <= 100){
            this.limit = limit;
        }

    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        if(rows >= 0){
            this.rows = rows;
        }
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }
    //获取当前页的起始行
    public int getOffset(){
        return (current * limit - limit);//current * limit为当前页的最后一行
    }
    //获取总页数
    public int getTotal(){
        if(rows % limit == 0){
            return rows / limit;
        }
        else{
            return rows / limit +1;
        }
    }
    //获取起始页码
    public int getFrom(){
        int from  =  current - 2;
        return from < 1  ? 1 : from;
    }
    //获取结束页码
    public int getTo(){
        int to  = current + 2;
        int total = getTotal();
        return to > total ? total : to;
    }
}
